Drop bundle exec from bin/rails in test_app
Drop bundle exec from bin/rails in test_app

Without this we are getting bundler errors

    bundle exec bin/rails db:environment:set RAILS_ENV=test
    bundler: failed to load command: bin/rails (bin/rails)
    Gem::LoadError: You have already activated arel 7.1.4, but your Gemfile requires arel 7.1.2. Prepending `bundle exec` to your command may solve this.
      /home/jhawthorn/.gem/ruby/2.3.1/gems/bundler-1.13.1/lib/bundler/runtime.rb:40:in `block in setup'
      /home/jhawthorn/.gem/ruby/2.3.1/gems/bundler-1.13.1/lib/bundler/runtime.rb:25:in `map'
      /home/jhawthorn/.gem/ruby/2.3.1/gems/bundler-1.13.1/lib/bundler/runtime.rb:25:in `setup'
      /home/jhawthorn/.gem/ruby/2.3.1/gems/bundler-1.13.1/lib/bundler.rb:99:in `setup'
      /home/jhawthorn/src/solidus/core/spec/dummy/config/boot.rb:6:in `<top (required)>'
      bin/rails:3:in `require_relative'
      bin/rails:3:in `<top (required)>'
    rake aborted!
    Command failed with status (1): [bundle exec bin/rails db:environment:set R...]

Arpsara/solidus,Arpsara/solidus,pervino/solidus,Arpsara/solidus,pervino/solidus,pervino/solidus,pervino/solidus,Arpsara/solidus